Militants in Damascus use an extensive network of underground communications to transport arms and ammunition from one location to another. They also connect key militant outposts with their main command center in the suburb of the Douma. The detection and elimination of these tunnels is one of the priorities for the Syrian army in the framework of the liberation of the eastern regions of the city from terrorists.
To date, the Syrian military has regained control of all the facilities in the vicinity of an industrial area north of Jobar, eliminating al-Nusra Front militants.
The military operation against positions controlled by Jabhat Fatah al-Sham (formerly known as the Nusra Front) began on December 24 after the militants refused to lay down their weapons and vacate the area.